108:1. (1) If one made an error (2) or as a result of unavoidable circumstances (3) did not pray the morning prayer, then he should pray (4) the afternoon prayer (5) twice; (6) the first for the afternoon prayer and the second to make up [the prayer he missed]. (7) If he did the opposite then (8) he failed to fulfill his obligation to compensate [for the prayer he missed] (9) and he needs to pray again - and the same is true in any place in which he needs to make up a prayer.

108:4. One can only compensate (16) the immediately preceding Service, meaning that if one accidentally omitted Shacharis (17) and Mincha he may repeat the Evening Service twice - the second time to compensate for omitting Mincha - but he cannot compensate for omitting Shacharis. The same applies to all other Services.

108:7. (21) If he deliberately did not (10) say one Amidah, then there is no ability to make up for it, even with Amidah next in time. But if he wants, he may say the ["making up"] Amidah as a voluntary prayer, (22) and there is no need to add anything new to it if he says the Amidah along with the Amidah next in time to it.